/*
 * Copyright 2002-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hsc.lock.store.noOp;

import com.hsc.lock.store.LockStore;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;

import java.util.concurrent.Callable;

/**
 * A no operation {@link LockStore} implementation suitable for disabling caching.
 *
 * <p>Will simply accept any items into the cache not actually storing them.
 *
 * @author Costin Leau
 * @author Stephane Nicoll
 * @since 4.3.4
 */
public class NoOpCache implements LockStore {

    private final String name;


    /**
     * Create a {@link NoOpCache} instance with the specified name.
     *
     * @param name the name of the cache
     */
    public NoOpCache(String name) {
        Assert.notNull(name, "Cache name must not be null");
        this.name = name;
    }


    @Override
    public Object getNativeCache() {
        return this;
    }

    @Override
    @Nullable
    public ValueWrapper get(Object key) {
        return null;
    }

    @Override
    @Nullable
    public <T> T get(Object key, @Nullable Class<T> type) {
        return null;
    }

    @Override
    @Nullable
    public <T> T get(Object key, Callable<T> valueLoader) {
        try {
            return valueLoader.call();
        } catch (Exception ex) {
            throw new ValueRetrievalException(key, valueLoader, ex);
        }
    }

    @Override
    public void put(Object key, @Nullable Object value) {
    }

    @Override
    @Nullable
    public ValueWrapper putIfAbsent(Object key, @Nullable Object value) {
        return null;
    }

    @Override
    public void evict(Object key) {
    }

    @Override
    public boolean evictIfPresent(Object key) {
        return false;
    }

    @Override
    public void clear() {
    }

    @Override
    public boolean invalidate() {
        return false;
    }

}
